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(No Model.) 2 Sheets-Sheet 1.

G. H. BOEOK.

BLUE FLAME OIL STOVE.

No. 603,124. J Zgj PatentedApr. 2.6, 1898.

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(No' Model.)

, 2 Sheets-Sheet 2. 0,. H. BOEOK BLUE FLAME OIL STOVE.

PatentedA 1 s a 6 s e W w I raven/Z 01 I u. 0. :4 m: Nuwms antes co,PHOTO-\JTHQ. wasnmmo UNITED STATES PATENT rrion.

CHARLES II. BOEOK, OF JACKSON, MICHIGAN, ASSIGNOR TO THE NOVELTYMANUFACTURING COMPANY, OF SAME PLACE.

BLUE-FLAME OlL-STOVE.

SPECIFICATION forming part of Letters Patent No. 603,124, dated April26, 1898.

Original application filed Augu t 10, 1896, Serial No. 602,368. Dividedand this application filed March 23,1898. Serial No.

. 674,908. (No model.)

To ctZZ whom it may concern:

Be it known that. 1, CHARLES H. BOECK, a citizen of the United States,residing at J ackson, in the county of Jackson and State 'of Michigan,have invented certain new and use- .ful Improvements in Blue-FlameOil-Stoves; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in [O the art to which it appertains to make and use the same.

My invention relates to improvements in oil-stoves or stoves which burna liquid hydrocarbon, and more particularly to improve- I 5 ments inthat class of stoves known as blueflame oil-stoves, andthe presentapplication is a division of that filed August 10, 1896, Se-

rial No. 602,368, in which is claimed the central draft-tube serving toboth lift the commingling-chamber and to supply air to the flame of theburner.

The principal object of the invention is to evolve a more intense andeffective heatingfiam'e from a given supply of liquid hydro- 2 5 carbonfuel than is possible in constructions heretofore in vogue, while at thesame time preserving a simplicity and compactness in form such ascalculated to improve the appearance and lend to the durability of thestove. I

Other objects are to provide for keeping the burner cool by means offresh-air currents induced in combustion and to provide improved meansfor conveniently manipulating the stove, including provision forobviating the giving off of offensive odors when the flame has beenextinguished.

With the above-stated objects in view the invention consists in certainnovel features 40 of construction and combinations of parts recited inthe appended claims, and preferred forms of which are specificallydescribed hereinafter and illustrated in the accompanying drawings,whereof- Figure 1 is a front elevation of an oil-stove embodying myinvention, the side of the lower portion of the wick-tube being brokenout and the wick-raising spindle being in crosssection. Fig. 2 is asectional view on line II II of Fig. 1, looking down. Fig. 3 is avertical sectional view on line III III of Fig. 1, and Fig. 4 is a topplan view of the burner portion and surrounding casing.

In the drawings similar letters of reference are employed to designatesimilar parts throughout the severalviews.

The reference-letterA designates the framework which supports the entirestove and upon which the top plate A is fastened, said top plate havinga suitable grate. A platform A" at the bottom part of the frame directlysupports the burner and has an opening at the center to afford a centraldraft for the latter, and an oil-tank F is supported at a suitableelevation at the back side of the frame and communicates with thewick-section of the burner by a suitable pipe in the usual way. Thiswick-section is made up of concentric tubes 0 O, with the usualwicklifter band w therebetween, which is operated by turning the handleor thumb-piece H of a spindle H, the latter carrying a pinion w, in meshwith a pendent rack w on the lifter-band. This spindle is preferablyprovided with an adjustable arm I, which strikes 7 5 a suitable pin I,fixed to the outer casing of the burner and limiting movement of thewick up or down, and said adjustable arm preferably consists of a stripor band of sheet metal folded over the spindle and clamped thereto by asmall screw-headed bolt. The outer tube 0 of the wick-section extendsdownwardly beyond the inner tube and is secured to the bottom plate orplatform A, fitting over a suitable flange thereon, to which it issecured by any suitable means, and the inner tube 0 is flanged at itslower end to close the wick-space, a suitable extension being providedto inclose the lifter-rack. At their upper ends the tubes 0 and O areflanged out- 0 wardly and inwardly, respectively, and also upwardly toform an annular space on both sides of the protruding upper end of thewick, this being a common construction in this class of oil-stoves.

Secured to the outer tube 0 by suitable wings 'r is a cylindrical casingB, open at the top and bottom, and resting upon a suitable flange at theupper part of this casing B is a removable casing B, having a series ofaper- 10o tures a, controlled bya suitable ring damper B, which may bemanipulated by a knob n for closing said apertures to permit acirculation of air in the space between the burner and this outer casing or for openin said apertures to admit a current of air from theoutside of said outer casing to check and partially prevent suchcirculation and to diffuse and oxidize the offensive gases arising fromthe burner when extinguished, said apertures being arranged just abovethe upper ends of the wick-tubes O C. These apertures also permit theintroduction of a match to light the Wick when the mixing-chamber israised. This mixing-chamber is made up of an outer perforated tube E andan inner perforated tube E, the latterbeing secured directly to acentral draft-tube D by rings E E, providing an annular space or chamberX, adapted to supply heated air to the mixing-chamber. The outer tube Ehas an inwardly-curved flange cat the top above the inner perforated thetop of the tubes C and 0, just inside the vertical flanges thereof, whenthe burner is in operation.

A tube 0, centrally located within and con-' nected by suitable wings ito the inside of wick-tube 0, serves as a guide to properly locate themixing-chamber above by reason of itsembracing the central draft-tubeD,which, together with the mixingchamber, is vertically movable. Fromthe lower end of this draft-tube D depends a rigid loop G, bearing upona lever G, which is pivoted to one side of the tube 0 and extends acrossthe same and through a vertical slot 9 in the opposite side of the tube0, said slot havinga notch g in one side at the top. It will be seenthat by raising and lowering the lever G, as indicated by the dottedlines in Fig. l, the draft-tube D and whatever is attached to the samewill be raised, and when the lever is lowered the draft-tube and itsattachments will return to their normal position by their own weight.

A cap Dis applied to the top of the draft tube D and has a row ofperforations 01 just above the latter to deliver air outwardly andproduce a complete combustion of all vapors generated in the chamberbelow at a point directly beneath anyvessel or object placed upon thegrate. The cap Dcan be made integral with the draft-tube D, but ispreferably made separable to afford a convenient means of access forbrushing and cleaning purposes. The draft-tube D is provided with aseries of openings or perforations d just beneath the lower ring E topermit a free passage of cold air next to the inside of the wick-tubeand is also perforated just above the said bottom ring E, as shown at d,and again higher up, as shown at d, to permit free access of air to feedthe heating-chanr ber X between inside tube E of the generating andmixing chamber and the draft-tube. and another series of perforations oropenings d is provided just below the top ring E to insure a freecirculation of air next to the inner side of the inner tube E.

Having thus described the various parts of my improved blue-flameoil-stove and indicated their shape and relative position, I will nowdescribe its operation and the method of using the same.

The tank F being filled with kerosene-oil. the wick IV is raised to theproper point for ignition, and then by means of lever G the draft-tubeand the attached generating and mixing chamber are lifted and retainedin the elevated position by moving the lever into the notch 6. Then thedamper Bis opened and the wick lighted through one of the apertures a, avery small flame being used, and thereafter this damper is closed andthe flame immediatelyheats the tubes E E and the chamber interveningbetween'the same and the draft-tube and induces a circulation whichdraws in air through the perforations, mixing the same thoroughly withthe vapor and flame which travels upward toward the top. hen the tubes EE become thoroughly heated, a circulation of air takes place up throughthe bottom of the drum B, around the outside of through the draft-tubeD,which feeds the chamberX between it and the inner tube E. causing aperfect mixing of heated air with the vapors rising from the wick. Airalso circulates up around the outside of the tube 0 and into thedraft-tube D just beneath the bottom ring E, and thus a supply of coldair is kept on the inside as well as on the outside of the wick-tubes.When the mixed vapor and air reaches the top, jets of fresh air enterthe large perforations in the top of the tube E and rapidly increase thecombustion at that point, and jets of fresh air spread outwardly fromthe capD and the inflamm able gases are abundantly fed with fresh oxygenboth from the inside and outside, causing a complete and fiercecombustion to take place at the top of the tubes directly underneath anyvessel or article placed on the grate above, which is the exact pointwhere such combustion is desired. When the flame is extinguished,thedamper B should beim mediately opened to check the draftpast the tube,as heretofore explained, which is a prime cause in inducing foul odorsfrom stoves of this class.

Having thus described my improved bluefiame oil-stove, I desire to statethat it can be considerably varied in its details without departing frommy invention. Other means might be provided for raising the draft-tn beand its connected parts, though what I have shown for the purposepossesses great merit on account of its great simplicity. A differentstyle of drum B B might be employed, though this structure of drum B isbelieved to be the simplest obtainable which will answer the purpose.The manner of connecting the tubes E E is not material, and other meanscould be provided for attaching them to the central draft-tube. Theouter tube E is very effective without the inwardly-projecting flange atthe top,though this inwardlyprojecting flange has the efiect ofconcentrating the force of the flame and prevents a scattering of itsheat. Other variations will no doubt suggest themselves to those skilledin the art to which my invention appertains. Therefore in the claimswhich follow I have recited what I consider theessential elements of theinvention without restriction to specific structure.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is-

1. In an oil-stove, the combination with a wick-section, of amixing-chamber arranged over the same, an iuclosed annular air-chamberadjacent to said mixing-chamber and communicating therewith by suitablepassages for supplying heated air thereto, and

means for supplying fresh air to said inclosed air-heating chamber,substantially as described.

2. In an oil-stove, the combination with a wick-section, of amixing-chamber arranged over the same, and an internally-arrangeddraft-tube separated from the mixing-chamber by a suitable air-space andprovided with a suitable passage or passages for supplying air to theair -space, substantially as described.

3. In an oil-stove, a central-draft wick-section, an annularmixing-chamber arranged over the same, and a draft-tube arrangedcentrally within the mixing-chamber and separated therefrom by anannular space or chamber adapted to supply heated air to saidmixing-chamber, said draft-tube being provided with suitable openings orpassages adjacent to the lower portion of the mixingchamber forsupplying air to the annular airspace, substantially as described.

4. In an oil-stove, the combination with a central-draft wick-section,of a mixing-chamber suitably supported over the same, and a draft-tubearranged within the mixing-chamber and separated therefrom by a suitablespace adapted to supply heated air thereto, said draft-tube beingprovided with a suitable passage or passages for supplying air from theinterior of the burner to said airspace, and with an opening or openingsat its upper portionfor supplying air to the flame issuing from themixing-chamber, substantially as described.

5. In an oil-stove, a central-draft wick-section, a mixing-chamberarranged over the same comprising concentric tubes provided withpassages for air, and an inner draft-tube separated from themixing-chamber by an air space or chamber closed at both ends andprovided withpassages for supplying air to said air-space, substantiallyas described.

6. In an oil-stove, the combination with a central-draft wick-section,of a mixing-chamber arranged over the same, an inner drafttube separatedfrom said mixing-chamber by a suitable air-space and provided withpassages for supplying air to said space from the interior of thewick-section, and a cap fitting the upper end of the draft-tube andprovided with a suitable passage or passages to direct air into theflame issuing from the mixingchamber, substantially as described.

7. In an oil-stove, the combination with a central-draft wick-section,of a mixing-chamber comprising concentric perforated tubes arranged oversaid wick-section, a central draft-tube, an annular space or chamberbetween the inner surface of the inner tube of the mixing-chamber andthe draft-tube, and rings connecting said drafttube to themixing-chamber so as to close the ends of saidair-space, said draft-tubebeing provided with air-passages for supplying air to the annular spaceor chamber, substantially as described.

8. In an oil stove, the combination with a central-draft wick-section,of a mixing-chamber, comprising concentric perforated tubes arrangedover said wicksection, a central draft-tube separated by annular spacesor chambers from the wick-section and the mix ing-chamber and providedwith passages or openings communicating with said spaces so as to createa circulation within the wick-section and to supply air to the annularspace between the mixing-chamber and draft-tube, together with means forcausing a draft aro und the outer surface of the wick-section, wherebycold air may be caused to circulate both around the inner and outersurfaces of said wick-section to keep the latter cool, substantially asdescribed.

9. In an'oil-stove, the combination with a central-draft wick-section,of a mixing-chamber arranged over the same, a central draft-- tube andconnections therewith for supplying air from the interior of thewick-section to the mixing-chamber, together with an openended outercasing for causing a draft or circulation of air around the outersurface of the wick-section to keep the latter cool, sub stantially asdescribed.

10. In an oil-stove, the combination with a central-draft wick-section,of a mixing-chamber provided with air-passages arranged over saidwick-section, and an inner draft-tube separated from the mixing-chamberby an air space or chamber closed at its ends and from the wick-sectionby a chamber or airspace having its lower end open and its upper endclosed, said draft-tube being provided with a passage or passagescommunicatin g with the air space or chamber between the mixing-chamberand the draft-tube and with a passage or passages communicating with theupper portion of the chamber or space between said tube and thewick-section, whereby air may be caused to circulate against the innersurface of the wick-section and air supplied to the space between thedraft-tube and mixing-chainber,substantiall y as described.

11. In an oil-stove, the combination with a central-draft wick-section,of a mixing-chamber comprising concentric tubes arranged over saidwick-sections, together with a central draft-tube separated from themixing.

chamber by an air space or chamber and pro vided with suitable passagesfor supplying air to said space from the interior of the wicksection,said outer tube of the mixing-chamberbeing taller than the inner tubeand having its upper end flanged or turned inwardly to concentrate theheat, substantially as described.

12. In an oil-stove, the combination with a suitable wick-section, of amixing-chamber arranged over the same, an inner draft-tube separatedfrom the mixing chamber by a suitable air space or chamber and providedwith passages for supplying air to said space, said draft-tube beingattached to the mixingchamber so as to move vertically therewith,together with means for raising said drafttube and mixing-chamber topermit the wick to be lighted, substantially as described.

13. In an oil-stove, the combination with a central-draft wick-section,of a mixing-chamber arranged over the same, an outer casing above, and alifting and air-feeding tube extending within the commingling-ehamberand forming between itself and the latter an airheating chamber incommunication with the com mingling-chamber, said tube communicatingwith said air-heating chamber and feed ing air to the principal flame ofthe burner, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

CHARLES H. BOECK.

Witnesses:

D. R. TARBELL, N. P. BEEBE.

